The Padres are receptive to trade offers for Wolf, but some scouts with other clubs said they are concerned about his 6.66 ERA away from Petco Park. His 7.88 ERA in July also could lower his trade value because clubs want to see if he can sustain stamina in the wake of arm ailments from previous years. Wolf has made seven starts against the Cardinals, going 3-3 with a 3.66 ERA.

Wellemeyer has yet to lose to an NL West club this season. In five starts against the West, he is 3-0 with a 3.60 ERA, and against the Padres he is 1-0 with a 2.57 ERA. In his past five starts, he is 0-3 with a 7.66 ERA.